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Finding the Fourth Proportional to 101,006.79, 139,385.78 and 55,065.48

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Solution

The fourth proportional to 101,006.79, 139,385.78 and 55,065.48 is: 75,988.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    101,006.79 : 139,385.78 = 55,065.48 : x
  2. Step 2: Convert to fraction form
    101,006.79/139,385.78 = 55,065.48/x
  3. Step 3: Cross multiply
    101,006.79x = 139,385.78 × 55,065.48
  4. Step 4: Simplify right side
    101,006.79x = 7,675,344,289.35
  5. Step 5: Solve for x
    x = 7,675,344,289.35/101,006.79
  6. Step 6: Final answer
    x = 75,988.40

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.